1. Review Question
Consider an unconfined aquifer overlying impermeable bedrock with the following properties
Porosity 27%
Specific retention 12%
Thickness 15 m
Hydraulic conductivity 12 m/day
Assume that there is 2 cm of precipitation that all infiltrates and percolates to the water table, calculate the water level rise (m). [10]
How much water can be produced by lowering the water table by 2 m over an area of 1 km2. Report your result in m3. [10]
[20 points]

2. 2. For a particular location the average net radiation is 145 W/m2, air temperature is 24 C, relative humidity is 65%, the wind speed is 1.5 m/s at a height of 2 m, and the roughness height zo is 0.02 cm.
Determine the open water evaporation rate using the combined method (mm/d). [10]
Determine the fraction of net radiation that is used in evaporation. [5]
Explain what happens to the energy from net radiation that is not used in evaporation. [5]
[20 points]